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Active, Potentially Active and Inactive volcanoes


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ACTIVE?!

INACTIVE?!

POTETIALLY ACTIVE?!

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and services primarily for the protection of life and property and in support of economic, productivity, and sustainable development. It is one of the service agencies of the Department of Science and Technology.

PHIVOLCS monitors volcano, earthquake, and tsunami activity, and issues warnings as necessary. It is mandated to mitigate disasters that may arise from such volcanic eruptions, earthquakes, tsunamis, and other related geotectonic phenomena

~ VOLCA- GO GO!! ~

ACTIVE VOLCANOES

  • Eruption in historic times

  • Historical record within 600 years

  • Radiocarbon dating (C14) dating to 10,000 years

  • Local seismic activity

  • Oral or folkloric history

EXAMPLE:

Mt. Taal eruption

Mt. Mayon eruption

POTENTIALLY ACTIVE VOLCANOES

  • Active solfataras, fumaroles, or steaming activity

  • Geologically young, possibly erupted < 10,000 years and for calderas and large systems, possibly < 25,000 years.

  • Young-looking geomorphology (thin soil cover or sparse vegetation; low degree of erosion and dissection; young vent features; with or without vegetation cover).

  • Suspected seismic activity.

  • Documented local ground deformation.

  • Geochemical indicators of magmatic involvement.

  • Geophysical proof of magma bodies.

  • Strong connection with subduction zones and external tectonic settings.

Example:

INACTIVE VOLCANOES

  • No record of eruption and its form is beginning to change by the agents of weathering and erosion via formation of deep and long gullies.

Examples:

soure: https://en.wikipedia.org/wiki/Philippine_Institute_of_Volcanology_and_Seismology


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